So apparently this is the deal: for $28 per member ($35 nonmembers), you get dinner, stargazing, camping out, breakfast the next morning, and a guided nature walk after breakfast. Tickets for the actual performance (, which got a positive review in the Chron) are sold separately. Batteries not included.
Note: the website doesn't seem to have a notice about this event -- we saw it listed in the East Bay Express and thought you should know about it. So if you're interested, call (510) 548-9666 and ask 'em.The Importance of Being Earnest